25724222 has 4 divisors (see below), whose sum is σ = 38586336. Its totient is φ = 12862110.

The previous prime is 25724197. The next prime is 25724227. The reversal of 25724222 is 22242752.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 25724191 and 25724200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25724227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6431054 + ... + 6431057.

It is an arithmetic number, because the mean of its divisors is an integer number (9646584).

Almost surely, 2^25724222 is an apocalyptic number.

25724222 is a deficient number, since it is larger than the sum of its proper divisors (12862114).

25724222 is a wasteful number, since it uses less digits than its factorization.

25724222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12862113.

The product of its digits is 4480, while the sum is 26.

The square root of 25724222 is about 5071.9051647285. The cubic root of 25724222 is about 295.1984569045.

Adding to 25724222 its reverse (22242752), we get a palindrome (47966974).

The spelling of 25724222 in words is "twenty-five million, seven hundred twenty-four thousand, two hundred twenty-two".